JP6257595B2 - Device for crimping yarn to the package - Google Patents

Description

  The present invention relates to an apparatus for crimping a yarn to a package. The invention further relates to a winder comprising a device according to the invention. The invention is particularly used during the production of synthetic yarns.

  German Patent Application No. 19632748 discloses a winding machine with a pressure roller supported on a movable roller support. When the yarn is wound, the pressure roller is pressed against the surface of the winding tube that is fastened over the driven winding spindle and guides the yarn to be laid on the surface of the winding tube. At the same time, the number of rotations of the pressure roller is used for closed loop control of the take-up spindle drive to obtain a constant peripheral speed of the package that continues to increase. In order to obtain a uniform package structure, the pressure roller is held on the surface of the package with a predetermined pressing force. In order to damp vibrations that occur based on the driven winding spindle, the bearing part of the pressure roller is formed with vibration dampening means. In this regard, O-rings are used as vibration damping means to support the outer ring of the bearing against the roller support. However, such a rubber element has a spring damper characteristic that varies greatly based on deterioration over the lifetime. Furthermore, since the rubber element is usually guided in the groove, it should be considered that the vibration damping means composed of a plurality of rubber elements arranged side by side has a certain width. This width gives rise to a relatively high bending stiffness. Based on being sandwiched between the pressure roller and the roller support, the housing of the rubber element is further related to the relative position of the pressure roller with respect to the roller support, so that the rigidity of the rubber element is constant. And can vary greatly. Now, it is observed that the tilting position of the central axis is constant or changes with time between the roller support and the bearing part of the pressure roller due to the vibration generated when winding the package and the load on the pressure roller. It was done. However, based on the variable bending stiffness of the rubber element, such a tilted position of the central axis causes a very uneven load on the track of the double row bearing. Furthermore, the known O-ring is not suitable for fixing the pressure roller in the axial direction relative to the roller support, that is, in parallel with the rotation axis of the pressure roller, so that the known pressure ring is pressure bonded In this apparatus, the pressure roller needs to be supported on the roller support by at least one fixed bearing. This has the disadvantage that the rigidity of the rubber element can be very different on both sides of the pressure roller, since a fixed joint occurs at least in the axial direction of the pressure roller between the pressure roller and the roller support. ing. This has a very adverse effect on the stability of the take-up spindle and promotes subharmonic and self-excited vibrations of the take-up spindle. Basically, the two rotating bodies that roll with respect to each other tend to self-excite, so it is desirable that the damping formed always exceeds this excitation in the operating range of the pressure roller.

  The object of the present invention is therefore to solve at least partly the problems mentioned with respect to the known prior art, and in particular to provide a device for crimping yarns to a package, in which vibrations in the crimping roller can be damped particularly effectively. It is. Furthermore, a winder equipped with a device for crimping a yarn to a package, which can particularly effectively dampen vibrations in the pressure roller, is provided.

  This problem is solved by an apparatus having the characteristics described in the characterizing part of claim 1 and a winder having the characteristics described in the characterizing part of claim 13. Further advantageous embodiments of the invention are described in the dependent claims. Furthermore, it may be pointed out that the features individually described in connection with the dependent claims can be combined with each other in any technically meaningful manner and define another aspect of the present invention. Furthermore, the features recited in the claims will be explained in greater detail in the detailed description, in which case advantageous further aspects of the invention are indicated.

  An apparatus according to the invention for crimping a yarn to a package comprises a crimping roller with a yarn guide section and at least one bearing section and a roller support with at least one receptacle. The pressure roller has a bearing with an outer surface at least in the area of the bearing section. At least one spring damper element is arranged on the outer surface of the bearing, and the crimping roller is rotatably supported in the at least one receiving part of the roller support by the bearing and at least one spring damper element, One spring damper element is formed in order to fix the pressure-bonding roller with respect to the roller support body in a radial and axial direction with elastic rigidity.

  The yarn to be crimped is in particular a synthetic yarn that is wound on a package at a speed of up to 7000 m / min. The pressure roller is preferably made of metal and has a rotationally symmetric cross section. The pressure roller may be manufactured from a solid material or may be manufactured from a hollow profile. The surface of the pressure roller has a thread guide section. This yarn guide section is an area of the pressure roller where the yarn is guided or pressed against the surface of the package. The pressure roller has a diameter of 50 mm to 150 mm, preferably 70 mm to 100 mm, in the yarn guide section. The yarn guide section has an axial length of 600 mm to 2400 mm. Furthermore, the pressure roller has at least one bearing section. The bearing section is preferably formed in the form of a bearing journal. The at least one bearing section has a length in the axial direction of the pressure roller of 20 mm to 50 mm, preferably 30 mm to 50 mm. The roller support is likewise made of metal and has at least one receiving part for the pressure roller. The roller support is advantageously formed as a swivel arm which is pivotally held in the machine frame and has at least one receiving part for the pressure roller at at least one free end. The at least one housing part may in particular be formed as a bearing hole. The pressure roller has a bearing in the region of at least one bearing section. The bearing may in particular be a rolling bearing, for example in the form of a ball bearing. In the case of rolling bearings, the bearings preferably have an inner ring and an outer ring with rolling elements arranged between them. The bearing has an outer surface. The outer surface may in particular be the outer surface of the outer ring of the bearing. At least one spring damper element is arranged on the outer surface of the bearing. The spring damper element is formed in order to dampen the vibration of the pressure roller partly or even completely. The spring damper element is at least partially elastic. Thus, the spring damper element may be at least partly formed from rubber. The pressure roller is rotatably supported in at least one housing provided in the roller support by a bearing and at least one spring damper element. Furthermore, the at least one spring damper element is formed so as to dampen and fix the pressure roller in the radial and axial directions relative to the roller support. This is particularly true when the at least one spring damper element is formed in such a way that the force generated on the crimping roller periodically when the yarn is crimped onto the package is transmitted to the roller support in both radial and axial directions. In this case, a separate bearing for the pressure roller is not required. The bearing of the pressure roller is therefore advantageously formed in the form of a floating support bearing. In this case, the at least one spring damper element provides damping in all directions of the pressure roller. However, the axial play of the pressure roller is reduced with a sufficiently great rigidity in the axial direction, preferably by means of at least one spring damper element. In this context, “fixing in the axial direction” means that the force periodically generated when the yarn is crimped onto the package can be transmitted to the roller support in the axial direction, ie parallel to the axis of rotation of the crimping roller. Means. “Radial fixation” means that the force generated periodically, especially when the yarn is crimped to the package, can be transmitted to the roller support in the radial direction, that is, in particular perpendicular to the axis of rotation of the crimping roller. I mean. Therefore, the pressure roller is fixed in the radial direction and the axial direction relative to the roller support, so that the vibration of the pressure roller is attenuated both in the radial direction and in the axial direction by at least one spring damper element. It is possible that the elastic stiffness of the spring damper element is formed and defined so that at least one spring damper element is provided so as to provide the stability required to fix the pressure roller both axially and radially. Has been.

  In another aspect, it is provided that the at least one spring damper element has an elastic layer disposed between the inner sleeve and the outer sleeve. The elastic layer is in particular an elastomer, for example rubber, in which case the elastic layer has a preload between the inner sleeve and the outer sleeve to improve the life of the elastic layer. You can do it. The elastic layer is rigidly coupled to the inner sleeve and the outer sleeve to form one component. Thus, the positioning of the pressure roller relative to the roller support is possible without adversely affecting the properties of the spring damper element, even with very long pressure rollers.

  Different winders are used depending on the use case in which the textured yarn is wound into a package in the POY process or FDY process or the processed yarn is wound into the package in an IDY process or BCF process. In this case, an aspect of the invention is that the elastic layer has a radial stiffness in the range of 1000 N / mm to 8000 N / mm with the preload applied between the inner sleeve and the outer sleeve. It has proved advantageous because it has. Thus, self-excited vibrations can be sufficiently damped in the frequency range that is important for operating speed, with small or large amplitude. The axial fixing of the pressure roller can be ensured for these use cases by an axial stiffness in the range from 150 N / mm to 1200 N / mm, especially of the elastic layer.

  The inner sleeve and the outer sleeve are preferably made of metal and have a circular cross section. The at least one spring damper element has an inner diameter of 20 mm to 80 mm, preferably 40 mm to 60 mm. The inner sleeve may be attached to the outer surface of the bearing, in particular by adhesive bonding, and the outer sleeve may be attached to at least the receiving part of the roller support by press-fitting.

  In order to prevent excessive loading of at least one spring damper element, an advantageous aspect of the invention provides for mechanically limiting the elastic mobility of the spring damper element. For this purpose, at least one elastic spring stopper arranged on the inner sleeve is provided to oppose the outer sleeve. Thus, in addition to pure radial vibration movement, cardan movement in particular in the spring damper element can also be prevented.

  The action of the spring damper element provided on the pressure roller is mainly defined by the incorporation and arrangement in the receiving part of the roller support. In order to obtain pre-adjusted spring damper characteristics in the spring damper element, at least one receiving part of the roller support has at least one bearing half shell removably coupled to the roller support. This embodiment is particularly advantageous. Thereby, a press fit between the outer sleeve and the roller support can be realized in a simple manner, for example by screwing a bearing half shell on the roller support.

  In another advantageous embodiment, the at least one spring damper element has a mounting surface on the outer surface of the bearing that has a length of 5 mm to 50 mm in the axial direction of the pressure roller. This aspect of the at least one spring damper element has been found to be particularly suitable for forming a secure connection between the outer surface of the bearing and the at least one spring damper element.

  In a particularly advantageous manner, at least one spring damper element is arranged approximately in the center of the outer surface of the bearing in the axial direction of the pressure roller. For this purpose, the spring damper element has a length shorter in the axial direction of the press roller than the length of the bearing in the axial direction of the press roller. Both the axis of the pressure roller and the axis of the hole in the at least one receiving part of the roller support may be inclined relative to each other by vibrations or due to manufacturing tolerances. Nevertheless, the axial length of the elastomer of the at least one spring damper element, i.e. the axial direction of the pressure roller, in order to ensure as uniform a load as possible on the two ball tracks of the bearing, in particular the ball bearing. It is necessary to keep the length small. In this case, “small” can be understood to be in particular a length of 1 to 10 mm. The at least one spring damper element thereby has a low bending stiffness or a high cardan displacement, so that the axis of rotation of the pressure roller and the axis of the hole of the at least one receiving part of the roller support are mutually connected. Can be compensated by bending in at least one spring damper element. By arranging at least one spring damper element in the center of the outer surface of the bearing, the bearing is evenly loaded in a further advantageous manner. The arrangement of the O-ring over the entire width of the bearing results in uneven loading and premature wear of the bearing.

  The pressure roller has a first end having a first bearing section and a second end having a second bearing section, and the first spring damper element is in the first bearing section. The second spring damper element is disposed in the second bearing section, and the first spring damper element has a smaller elastic stiffness than the second spring damper element. Are likewise advantageous. The first end of the pressure roller may be on the drive side, for example, and the second end may be on the driven side of the pressure roller. Based on the structure of the winding head of the winder, various bearing stiffnesses occur at the first end and the second end of the pressure roller. This different bearing stiffness can be compensated by an elastic stiffness of the first spring damper element that is small compared to the elastic stiffness of the second spring damper element, so that the effective bearing stiffness of the pressure roller is: The first end and the second end are substantially the same.

  In a refinement of the invention, it is proposed that the outer surface of the bearing has a groove. The groove serves to accommodate an electrical conductor. In this case, the electrical conductor forms a conductive connection between the bearing and the roller support so that electrostatic charging of the pressure roller can be prevented. The electrical conductor may in particular be an octagonal spring and / or a coil spring.

  A bearing has a first outer diameter region having a first diameter, a second outer diameter region having a second diameter, and a third diameter having a third diameter starting from one end of the pressure roller. And the fourth outer diameter region having the fourth diameter, and the first step portion is protected between the third outer diameter region and the fourth outer diameter region. It is equally advantageous to act as a stopper for the ring. The protective ring is preferably a metal ring which is arranged on the outer surface of the bearing, thereby protecting the bearing from ingress of residual yarn.

  Particularly advantageously, the device has at least one guard ring with a stopper area, the at least one guard ring being in contact with the roller support during the axial movement of the crimping roller. This prevents further movement of the pressure roller. The at least one spring damper element can transmit the force regularly generated by the spring damper element to the roller support in the axial direction of the pressure roller, in which case the pressure roller exceeds the tolerance range in the axial direction. Designed not to move on. It is clear that at least one spring damper element moves the crimping roller to its axial starting position again when the load on the crimping roller is reduced due to its elasticity. However, in the event of a large special load acting in the axial direction, the stop area of the at least one guard ring comes into contact with the roller support, thereby reducing the tolerance range in order to avoid damaging the at least one spring damper element. It is possible to prevent the movement of the pressure roller beyond the limit. In particular, it is advantageous if the first protective ring is arranged on the outer surface of the first bearing and the second protective ring is arranged on the outer surface of the second bearing. The stopper area of the first protective ring is in contact with the roller support, particularly when the pressure roller is moved in the axial direction of 1.5 mm, and the stopper area of the second protective ring is particularly in the axial direction of 2 mm of the pressure roller. Contact the roller support during movement.

  Finally, a winder with a device of the type described above is proposed.

  The invention and the technical scope are explained in more detail below with reference to the drawings. The drawings show particularly advantageous embodiments of the invention, but the invention is not limited thereto.

It is a front view which shows embodiment of the winding machine provided with the apparatus which concerns on this invention. It is a side view which shows embodiment of the winding machine provided with the apparatus which concerns on this invention. It is sectional drawing which shows embodiment of the apparatus which concerns on this invention. It is detail drawing which shows embodiment of the apparatus based on this invention.

  FIG. 1 shows a winder 36 provided with a device 1 for crimping the yarn 2 onto the package 3. The apparatus 1 has a pressure roller 4. The pressure roller 4 is coupled to a winder 36 via a movable roller support 7. The roller support 7 is formed as a turning lever that is held by the winder 36 via a turning bearing 49. A pressure roller 4 is held at the free end of the roller support 7. The pressure roller 4 presses the yarn 2 toward the surface of the package 3 that is rotatably supported by the winding spindle 43.

  FIG. 2 shows the winder 36 shown in FIG. 1 in a side view. A pressure roller 4 with a thread guide section 5 can be seen, in which two threads 2 are each wound on one package 3. The pressure roller 4 further has a first bearing section 6 at the first end 20. The first bearing section 6 is supported in the first housing 8 of the roller support 7. Furthermore, the pressure roller 4 has a second bearing section 22 at the second end 21. The second bearing section 22 is supported in the second housing part 38 of the roller support 7. As will be described in more detail below, the first housing portion 8 of the roller support 7 has a first bearing half shell 47, and the second housing portion 38 of the roller support 7 has a second housing portion 38. A bearing half shell 48 is provided. The bearing half shells 47 and 48 are firmly connected to the roller support 7.

  FIG. 3 shows an apparatus 1 for crimping a thread (not shown) to a package 3 (not shown). The pressure roller 4 has a rotationally symmetrical cross section in the first bearing section 6, the thread guide section 5 and the second bearing section 22, as can be seen from the suggested (rotation) axis 41. ing. In the present embodiment, a first bearing 9 is arranged in the first bearing section 6 formed as a bearing journal. The first bearing 9 illustrated in FIG. 3 is a ball bearing having two ball tracks. In the second bearing section 22, a second bearing 39 identical to the first bearing 9 is arranged. The bearings 9 and 39 are incorporated mirror-symmetrically with respect to each other. Therefore, the description relating to the first bearing 9 applies to the second bearing 39 correspondingly in the same manner. A first spring damper element 11 is arranged on the outer surface 10 of the first bearing 9, and a second spring damper element 23 is correspondingly formed on the outer surface 10 of the second bearing 39. The first spring damper element 11 and the second spring damper element 23 are arranged so that the vibration of the pressure roller 4 can be damped in the radial direction 44 and the axial direction 19 relative to the (rotation) axis 41. Is formed. The pressure roller 4 passes through the first bearing 9 and the first spring damper element 11 in the first housing part 8 of the roller support 7 and correspondingly the second housing part 38 of the roller support 7. It is supported via an inner second bearing 39 and a second spring damper element 23. The first accommodating portion 8 is formed between the roller support 7 and the first bearing half shell 47, and the second accommodating portion 38 is disposed between the roller support 7 and the second bearing half shell 48. Is formed. The first bearing half shell 47 and the second bearing half shell 48 are firmly connected to the roller support 7.

  Further, a first protective ring 33 is disposed on the outer surface 10 of the first bearing 9, and a second protective ring 40 is disposed on the outer surface 10 of the second bearing 39. The first protective ring 33 and the second protective ring 40 cause the remaining yarn to enter the first bearing 9 or the second bearing 39 from the yarn guide section 5 and damage these bearings 9 and 39. To prevent. Both the first protective ring 33 and the second protective ring 40 each have one stopper region 34, so that, for example, when the pressing roller 4 moves in the axial direction inadvertently when the spring damper element 11 fails. In addition, it is possible to ensure the reliable holding of the bearing 9 or the bearing 39 in the accommodating portions 8 and 38 of the roller support 7.

  FIG. 4 shows a detailed view of the profile cross section of the first bearing 9 and the first spring damper element 11 corresponding to the upper right region of FIG. The first spring damper element 11 has an elastic layer 14 arranged between an inner sleeve 12 and an outer sleeve 13. The elastic layer 14 is advantageously formed between the sleeves 12 and 13 as vulcanized rubber and has a preselected elastic stiffness for each use case. Thereby, it is possible to ensure the radial and axial position fixing of the pressure roller 4 on the roller support 7. Thus, the selected radial stiffness is between 1000 N / mm and 8000 N / mm and the axial stiffness is between 150 N / mm and 1200 N / mm.

  The elastic layer 14 does not extend over the entire sleeve width of the sleeves 12,13. Next to the side of the elastic layer 14, two spring stoppers 45 and 46 are formed on the inner sleeve 12 so as to face the outer sleeve 13. The spring stoppers 45 and 46 are made of an elastic material. This elastic material has a clearly higher stiffness compared to the elastic layer 14. The spring stoppers 45 and 46 of the spring damper element 11 limit the mobility in the radial direction and the bending movement at the bearing location.

  The contact surface between the inner sleeve 12 and the outer surface 10 of the first bearing 9 forms a mounting surface 15 having a first axial length 16 in the axial direction 19. In the present embodiment, the first axial length 16 of the mounting surface 15 of the bearing 9 is the same as the second length 17 of the first spring damper element 11 in the axial direction 19 of the pressure roller 4. Length. The first bearing 9 has a third length 18 in the axial direction 19 of the pressure roller 4. In this case, the second length 17 is shorter than the third length 18. The first spring damper element 11 is disposed substantially at the center of the outer surface 10 of the first bearing 9 in the axial direction 19 of the pressure roller 4. Starting from the first end 20 of the pressure roller 4, the first bearing 9 includes a first outer diameter area 24, a second outer diameter area 25, a third outer diameter area 26, and a fourth outer diameter area. And an outer diameter region 27 of FIG. The first outer diameter region 24 has a first diameter 28, the second outer diameter region 25 has a second diameter 29, and the third outer diameter region 26 has a third diameter 30. The fourth outer diameter region 27 has a fourth diameter 31. Between the third outer diameter region 26 and the fourth outer diameter region 27, the first step 32 serves as a stopper for the first protective ring 33. Between the second outer diameter region 25 and the third outer diameter region 26, the second step portion 37 serves as a stopper for the first spring damper element 11. Further, the outer surface 10 of the first bearing 9 has a groove 42. The groove 42 serves to accommodate the electrical conductor 35. The description relating to the first bearing 9, the first spring damper element 11 and the first protective ring 33 can be applied correspondingly to the second bearing 39, the second spring damper element 23 and the second protective ring 40. It is.

  The present invention is superior due to particularly effective damping of the pressure roller vibration.

DESCRIPTION OF SYMBOLS 1 Apparatus 2 Thread 3 Package 4 Pressure roller 5 Thread guide section 6 1st bearing section 7 Roller support body 8 1st accommodating part 9 1st bearing 10 Outer surface 11 1st spring damper element 12 Inner sleeve 13 Outside sleeve 13 Sleeve 14 Elastic layer 15 Mounting surface 16 First axial length 17 Second axial length 18 Third axial length 19 Axial direction 20 First end 21 Second end 22 2nd bearing section 23 2nd spring damper element 24 1st outer diameter area 25 2nd outer diameter area 26 3rd outer diameter area 27 4th outer diameter area 28 1st diameter 29 2nd diameter 30 Third diameter 31 Fourth diameter 32 First step portion 33 First protection ring 34 Stopper region 35 Electrical conductor 36 Winder 37 Second step portion 38 Second accommodating portion 39 Second portion Bearing 40 2nd Protective ring 41 (Rotation) axis 42 Groove 43 Winding spindle 44 Radial direction 45 First spring stopper 46 Second spring stopper 47 First bearing half shell 48 Second bearing half shell 49 Slewing bearing

Claims (11)

A device (1) for crimping a thread (2) to a package (3),
A pressure roller (4) having a thread guide section (5);
A roller support (7) having at least one receiving part (8, 38),
The pressure roller (4) has a first end (20) having a first bearing section (6) and a second end (21) having a second bearing section (22). And
The pressure roller (4) has bearings (9, 39) each having an outer surface (10) in the region of the first and second bearing sections (6, 22). At least one spring damper element (11, 23) is disposed on the outer surface (10) of (9, 39);
The pressure roller (4) is a floating support bearing in the housing (8, 38) of the roller support (7) by the bearing (9, 39) and the spring damper element (11, 23). It is supported in a form that can be rotated,
Each of the spring damper elements (11, 23) fixes the pressure roller (4) to the roller support (7) relatively elastically in the radial direction and in the axial direction. The at least one spring damper element (11, 23) comprises an elastic layer (14) disposed between the inner sleeve (12) and the outer sleeve (13). The at least one spring damper element (11, 23) is disposed on the inner sleeve (12) and is at least one elastic spring stopper (45, 46) facing the outer sleeve (13). characterized in that it includes a) a device for crimping the yarn package. It said elastic layer (14) has a stiffness of predefined radial range of 1000N / mm~8000N / mm, apparatus according to claim 1. The device according to claim 1 or 2 , wherein the elastic layer (14) has a predefined axial stiffness in the range of 150 N / mm to 1200 N / mm. The at least one receiving portion (8, 38) of the roller support (7) has at least one bearing half shell (47, 48) removably coupled to the roller support (7). 4. The device according to any one of claims 1 to 3 . The at least one spring damper element (11, 23) has a length (16) of 5 mm to 50 mm in the axial direction (19) of the pressure roller (4) on the outer surface (10) of the bearing (9). a surface (15) mounting equipped with are, apparatus according to any one of claims 1 to 4. The at least one spring damper element (11, 23) is arranged in the center of the outer surface (10) of the bearing (9, 39) in the axial direction (19) of the press roller (4). the apparatus of any one of claims 1 to 5. A first spring damper element (11) is disposed in the first bearing section (6), and a second spring damper element (23) is disposed in the second bearing section (22). and has the first spring damper element (11) has a smaller elastic rigidity than the second spring damper element (23), any one of claims 1 to 6 Equipment. The outer surface (10) of the bearing (9) has a groove (42), which serves to accommodate an electrical conductor (35), which is electrically connected to the electrical conductor ( 35) forms a conductive connection between the bearing (9) and the roller support (7), and can prevent electrostatic charging to the pressure roller (4). Item 8. The apparatus according to any one of Items 1 to 7 . The bearing (9) has a first outer diameter region (24) having a first diameter (28) starting from one end (20, 21) of the pressure roller (4), and a second A second outer diameter area (25) having a diameter (29), a third outer diameter area (26) having a third diameter (30), and a fourth outer diameter having a fourth diameter (31). A first step portion (32) between the third outer diameter region (26) and the fourth outer diameter region (27). The device according to any one of claims 1 to 8 , which functions as a stopper for 40). At least one protection ring (33, 40) with a stopper region (34) is provided, the at least one protection ring (33, 40) in the axial direction (19) of the pressure roller (4). 8. The device according to claim 7 , wherein further movement of the pressure roller (4) is prevented by contacting the roller support (7) during movement of the roller (4). Characterized in that it comprises a device according to any one of claims 1 to 10, winder (36).

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